ARMINGTON & SIMS HIGH SPEED ENGINE.
The cylinder and steam chest of this engine are cast in one piece and bolted securely to the engine frame, which forms the front cylinder head. The cylinder is lagged with mineral wool and jacketed to prevent radiation, and it is overhanging and self-lining.
The valve is a hollow piston valve, the body of which is steel tubing with cast iron ends. It receives its motion from the shaft governor, attached to one of the band wheels, which regulates the cut-off automatically according to the variation of load. The steam is exhausted at each end of the valve by very direct passages which quickly free the cylinder, preventing back pressure.
The engine frame is cast heavy and rigid, and contains the locomotive guides for cross-head and the pillow block bearings for the crank shaft.
The double disc center crank shafts allow of two small heavy band wheels being used.
The base of this engine is cast in one piece, to which the engine frame is securely bolted, and with this arrangement, the engine needs no expensive foundation.
The engine is simple and self-contained, ranging in sizes from 11 to 450 horse-power, and is intended to run at the very high speed of from two hundred to three hundred and fifty revolutions per minute according to size, and is used extensively in driving electric lighting machinery, and where high speed and continuous work is desired.